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Structural Defects of Initial Crystallization Areas in Single-Crystalline Turbine Blades

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Powder Metallurgy and Metal Ceramics Aims and scope

The as-cast single-crystalline turbine blades made of CMSX-4 superalloy were studied. The blades were obtained by the Bridgman technique at a withdrawal rate of 5mm/min. The as-cast samples were prepared by cutting the blade root with a fragment of selector. The dendritic structure of obtained samples was studied by Scanning Electron Microscopy. The crystal orientation and lattice parameters were analyzed by Ω-scan mapping method. Additionally, the X-ray diffraction topography was applied. It was found that the most structural defects are created in the areas where a change in the shape and dimensions of the blades occur. Even minor changes in their geometry and the unevenness of mold walls may also affect the formation of defects.

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Authors and Affiliations

  1. University of Silesia, Institute of Materials Science, Department of Crystalography, Chorzow, Poland

    J. Krawczyk, A. Tondos, W. Bogdanowicz & R. Paszkowski

Authors
  1. J. Krawczyk
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  2. A. Tondos
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  3. W. Bogdanowicz
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  4. R. Paszkowski
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Corresponding author

Correspondence to A. Tondos.

Additional information

Published in Poroshkovaya Metallurgiya, Vol. 56, Nos. 7–8 (516), pp. 153–159, 2017.

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Krawczyk, J., Tondos, A., Bogdanowicz, W. et al. Structural Defects of Initial Crystallization Areas in Single-Crystalline Turbine Blades. Powder Metall Met Ceram 56, 481–486 (2017). https://doi.org/10.1007/s11106-017-9919-z

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  • DOI: https://doi.org/10.1007/s11106-017-9919-z

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